Bending machine



Feb. 26; 1929.

A.' T. CAROZZA ET AL BENDING MACHINE 5 Sheets-Sheet l Filed Nov. 30, 1925 Feb. 26, 1929.

A. T. CAROZZA ET AL BEND-ma MACHINE l"Filed Nov. 50, 1925 5 Sheets-Sheet 2 INVENTOR f Feb. 26, 1929. 1,703,261

A. T. cARozzA ET AL BENDING MACHINE Filed Nov. 30, 1925 5 Sheets-Sheet 5 Q INI/ENTOR BYW Patented Feb. 26, 1929.

UNITED STATES PATENT OFFICE.

ANToNIo T. cAnozzA, or cAToNsvILLE, AND JOHN'H. SMITH, or BALTIMORE,

- i MARYLAND.

BENDING MACHINE.

Application tiled November 30, 1925. Serial No. 72,356.

The object of our invention is the conn struction of an improved bending machine specially adapted for bending metal rods, bars, or the like, used in concrete construction.

A further object of our invention is the providing of a bending machine adjustable in its parts whereby bends may be made at desired points of the material operated upon.

A further object of our invention is the providing of means for bending the hook on the bars or rods.

A further object of our invention is the providing of simple and .easy means for controlling the bending to a predetermined shape.

Vith the foregoing and other objects in view, our invention consists of the novel construction, combination and arrangement of parts as hereinafter specifically described and illustrated in the accompanying drawing', wherein is shown the preferred embodiment of our invention, but it is understood that changes, variations and modifications may be resorted to which come within the scope of the claims hereunto appended.

ln the drawings `of the herein-described embodiment of our invention, Fig. 1 is a plan view of our bending machine in position before bendingis started, a round rod being shown in position ready to be operatedupon. Any shapes may be successfully bent in this machine, whether square, triangle-shaped, channelled, or the like, and we are simply showing a circular section or round rod as an example., Fig. 2 is a plan view of the same machine shown in Fig. 1, excepting that the bending has taken place, and shows the relative position of the parts after said bending. In Figs. l and 2 the hooks on the end of the bar have not as yet been turned. Fig. 3 is an enlarged sectional view in elevation taken through 3 3 of Fig. l. Fig. 4 is an enlargedV sectional view in elevation taken through 4 4 of Figs. 1 and 2. Fig. 5`is an enlarged sectional View in elevation taken through 5 5 of Figs. l and 2, and shows the hook or end bending means. Fig. 6 is an enlarged view in elevation, partly in section., taken through 6 6 of Figs. l and 2. ,Fig 7 is an enlarged sectional View in elevation taken through 7 7 of F igfl. Fig. 8 is a sectional view taken through 8 8 of Fig. 3. Fig. 9 is a sectional view taken through 9 9 of Fig. 3, and Fig. l0 shows the adjusting block.

In the construction of reinforced concrete, the bending or formingof the metal reinforcement is a somewhat slow and tedious process, as practiced at the present time. To speed up this partof construction work we have devised this forming or bending machine `which may be set to the desired form required, and then the bars or rods may be very rapidly shaped. The rods or bars are of varying lengths, and it is necessary to have a machine which is to be used on various jobs of sufficient flexibility to bend different lengths of material at different points and at different angles. This we have accomplished. The power required is rather immaterial; we have used hydraulic, as will be seen in the drawings as herein particularly illustrated. But any means for moving the parts into the positions desired may be resorted to, such fr as plungers operated by gears, links connected on cams, or by many other methods. We do not claim anything concerning the power used as to its character or source.

In the illustrations herein shown, similar numerals refer to similar parts throughout the several Views.

l is one member of the main frame, in the case shown a channel bar. 9. is another member of the main frame, in the case illustrated a channel bar. 3 is a supporting member of the main frame. 4 are topplates. 5 is the yoke lwhich extends on top of top plates 4 and is provided with guide lug 6. Yoke 5 is made of top and bottom members 5 and 5, with spacing member 7 at each edge. Around this yoke 5 are stirrups 8, which may be secured to yoke 5 by locking screws 9. Stirrups 8 are attached to a bending block 10, forming a central die, or dies. It will be noticed that stirrups 8 may be adjusted longitudinally along yoke 5, thus determining the pointsv of bending of the material desired. Yoke 5 is operated by piston rod 1l, which in turn is operated by some appropriate means, such as a hydraulic piston and cylinder 12. The usual control for operating this hydraulic system is not shown, the same being old, and may be such means as a two-way valve, or the like, and a pressure tank or source.

13 are movable bending blocks operated in slide-way 111 by means or' lug 15 and constitutes the end die, or dies. Slide-way 141 is formed, as shown, out of a Z bar secured vto the front member of main trame 2, as shown.

Referring to the two hook bending units shown 16 isdtlie inside hook-bending die, preferably circular, and 17 is the outside hoolibending die, preterably circular, these two dies forming wheels around which and by which the hooks on the ends of the bars are swiped. rllhese dies are interchangeable and other dies of varying diameters may be used of a similar character where dii'l'erent hool: bends are desired. These dies are each mounted on a revolving member 19 which is mounted on shaft 2O revolving in journal `bearing 21. Journal bearing 21 may be positioned between outside member 1 oit the i'rame and the supporting member 3 in such a position from the other swiping dies located near the operating cylinder 18 so to be adjusted to the length ot the rods operated upon and there secured by any well-known means, such as bolts 32, or stops,y through said members.

22, 22 are operating gears operatingl these dies and are driven by outside rack 23 and inside rack 2li, which racks are operated by piston rod 25 connected to the piston within the cylinder 18.

The usual control for operating this hydraulic `system is not shown, the same being old, and may be such means as a two-way valve', or the like, and a pressure tank or source.

26 and 27 are limit stops connected together and may be jointly moved in slide-way 14 and between which stops bending block 13 operates, a means being provided', as shown in springs 28, to maintainthe bending blocks 18 in extreme out position normally. 29, 29 are adjusting blocks carrying pins 30 and are 4adjusted by means oit' adjusting screws 31.

Before describing` the operation oi our invention, it might be wellto state here that bars for concrete work are deformed, ragged or rugged bars, and, consequently, will not readily slip tliroughbending blocks. Therefore', as bending begins the movable bending blocks 13 begin to approach the middle position, forming a bend. at their edge, and the sharpness or' the bend is determined according to the stroke ot the yoke and the nearness 'of the movable bending block 13 to the bending block 10 in initial position. rihis is determined by the positioning of limit stops 26 and 2T in slideway 14, which stops are provided with means for securing the saine in said slideway, suoli as bolts or other means not shown. Usually it is so positioned that the finished product is at an angle ot practically 115 degrees from the straight parts.

fitter the bar has been angularly bent it is desired to form hooks the ends; this is done by lifting the bar out ot the bending blocks inserting the same into a hook bender and revolving the same according to the angle ot' hook desired. There* are two shown, one positioned near the operating cylinder and the other adjustable between outside member 1 and supporting member 3, so that the two may be adjusted for various lengt is oit bars and both ends may be simultaneously operated upon. rlthe dies of the hook-bending machine, inside die 16 andoutside die 17, may be changed to suit the radius desired tor the hook, and the angle is determined upon the angular movement of the dies. is suggested above, both ends of the bar are bent simultaneously, one end being bent in one hook-turning die and the other in the other hook-turning die, after the said dies have been relatively positioned tor the length desired; one ot said dies being mounted to slide between main trame member 1 and supporting member 3, as shown in Fig. 3. Means may be provided to secure this bending dieV in the position desired.

The bending dies operate in di-ii'erent directions, so as to give the necessary and proper syi'nmetrical hool turn of the bar, and are driven by a rack inside and outside, operated by hydraulic piston 18.

Having thusvdescribed our invention, what we claim and desire to secure by Letters Patent is:

1. An organized bending` machine provided with end dies and central dies in alignment, means tor adjusting said central dies along said alignment, means for adjusting' said end dies along said alignment, and means for relatively moving parallelly the alignment oi. the central dies with reference to the alignment of the end dies, and means for permitting a pre-determined movement ot said end dies along said alignment as said central dies are being displaced.

2. jin organized bending machine provided with a central die, an end holding die and means for relatively positioning said end .die with reference to said central die consistineof a plurality of blocks in unit construction between which said end die operates, the said blocks being vrelatively adjustable with reference to the central die.

An organized bending machine provided with a central die, an end holding die and means for relatively positioning said end die with reference to said central die consisting ol a plurality of blocks in unit construction between which said end die ope ates. the said blocks being relatively adjustable with reference to the centraldie,

I the same at a relatively fixed position.

L1..An organized bending machine provided with a cent1-a1 die, an end holding die initially positioned in alignment with said central die and means for relatively positioning said end die with reference to said central die and means for permitting the movement of said die parallel with the line of said initial alignment during bending and of limiting the said movement.

ANTONIO T. CAROZZA, JOHN H. SMITH. 

